<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>br 换行</title>
</head>
<body>
    <p>
        To break lines<br/> use br.
    </p>

    <p>A：After A. insert one empty lines</p>
    <br>

    <p>B</p>

</body>
</html>